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The site states the following, "The domestic first sets Φ level 6 to 7 m composite shield main bearing of company research and development have passed the factory acceptance." We observed that the web site stated " Luoyang bearing takes the remanufacturing head start of shield tunneling machine." It also stated " Car, Trucks and Buses. Deep groove ball bearings are bearing the most common type of bearing that. LYCs self-aligning ball bearing has a spherical raceway in the outer rin. Slewing bearing is a la." The header had slewing bearing as the highest ranking keyword. This keyword was followed by tapered roller bearings, deep groove ball bearing, and tapered roller bearing which isn't as urgent as slewing bearing.